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<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <script>
        function f() {
            return () => alert(arguments[0]);
        }

        //弹出结果为1
        f(1, 2)(3, 4);;
    </script>
</body>

</html>